Tummy time builds the muscle strength babies need to hold up their heads, roll over, sit, crawl, and eventually walk. It also helps prevent flat spots from forming on the back of the skull, a condition that became far more common after parents were advised to put babies to sleep on their backs. The American Academy of Pediatrics recommends starting tummy time soon after hospital discharge and working up to at least 15 to 30 minutes total per day by 7 weeks of age.
How Tummy Time Builds Strength and Motor Skills
When a baby lies face down on a firm surface, gravity becomes their workout equipment. Lifting the head, even briefly, engages the neck, shoulders, upper back, and arms in ways that lying on the back simply doesn’t. These are the same muscle groups a baby will rely on months later to push up onto all fours, sit without toppling, and take first steps.
The progression is gradual. A newborn might only tolerate a minute or two and barely lift their chin off the surface. Over the following weeks, babies begin pushing up on their forearms, then on extended arms, then shifting their weight side to side. Each of these stages develops the motor control needed for the next milestone. Babies who get regular tummy time tend to reach rolling, sitting, and crawling on a more typical timeline because the foundational strength is already there.
Preventing Flat Head Syndrome
Since the early 1990s, the “Back to Sleep” campaign has dramatically reduced sudden infant death. But an unintended consequence was a sharp rise in positional plagiocephaly, the medical term for a flattened spot on the back or side of an infant’s skull. More babies spending more hours on their backs meant more pressure on the same area of a still-soft skull, and referrals to physiotherapy and craniofacial clinics climbed.
Tummy time directly counteracts this. A Finnish study that gave new parents detailed instruction on tummy time and positioning found that by 3 months, the rate of plagiocephaly in the intervention group was roughly half that of the control group (15% versus 33%). The key is starting early and being consistent. Regular supervised tummy time, combined with limiting time in car seats, bouncers, and other devices that press on the back of the head, can prevent or reduce the severity of skull flattening.
Sensory and Visual Development
Tummy time isn’t just a strength exercise. When babies are on their stomachs, they experience the world from a completely different angle. They begin to develop body awareness and a sense of balance as they shift their weight and adjust to the surface beneath them. This early vestibular input, the feeling of where your body is in space, lays groundwork for coordination later on.
There’s a visual benefit too. Babies on their tummies naturally watch their own hands as they reach for toys or press into the floor. This is some of the earliest hand-eye coordination practice they get, and it’s hard to replicate while lying on the back staring at the ceiling.
How Much Tummy Time Babies Need
The AAP recommends beginning with short sessions soon after you bring your baby home from the hospital. At first, even one to two minutes at a time is fine. The goal is to gradually increase until your baby is getting at least 15 to 30 minutes of total tummy time spread throughout the day by around 7 weeks old. This doesn’t need to happen in one stretch. Three to five shorter sessions scattered across the day work just as well, and most young babies prefer it that way.
As your baby grows and gets stronger, sessions will naturally get longer. By 3 to 4 months, many babies are comfortable spending several minutes at a time on their stomachs and may even start to enjoy it as they gain enough strength to look around and interact with toys.
What to Do When Your Baby Hates It
Many babies protest tummy time, especially in the early weeks. This is normal. Their muscles are weak, the position is unfamiliar, and they can’t see much yet. A few alternatives can help you build up tolerance without a miserable baby.
- Tummy to tummy: Recline in a chair or on a bed and lay your baby face down on your chest. You can start this even before the umbilical cord stump falls off. Your warmth, heartbeat, and face right in front of them make this the gentlest introduction.
- Lap time: Place your baby tummy down across your thighs lengthwise, supporting their head. The slight elevation and your touch can make this more comfortable than the floor.
- Side lying: If your baby truly won’t tolerate being on their stomach, laying them on their side with support is a useful alternative that still takes pressure off the back of the skull and engages different muscles than back lying.
Getting down on the floor at your baby’s eye level helps too. Placing a colorful toy just within reach or making eye contact and talking gives them a reason to stay in position a little longer. Even adding 30 seconds to each session adds up over the course of a day.
Tummy Time vs. Sleep Position
The rules here are simple but worth stating clearly: babies sleep on their backs, every time, for every nap and nighttime sleep, until they turn one. Tummy time happens only when the baby is awake and you are actively watching. These two recommendations work together. Back sleeping reduces the risk of sleep-related infant death, and tummy time during waking hours offsets the developmental and skull-shape effects of all that time spent on the back.
Side sleeping is not considered safe for infants, and the back-sleeping guideline applies even for babies with reflux. The supine position on a flat, firm surface does not increase the risk of choking. Once your baby can roll both ways on their own, they may choose their own sleep position, but you should still place them on their back at the start of every sleep.